Long-term stability of ceramics in liquid lithium

B. A. Pint; L. D. Chitwood; J. R. Di Stefano

doi:10.1016/S0022-3115(00)00683-8

Long-term stability of ceramics in liquid lithium

B. A. Pint, L. D. Chitwood, J. R. Di Stefano

Materials Science and Technology Div

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

Two candidate materials for insulating coatings in a lithium-cooled fusion reactor have been exposed to lithium in 1000 h isothermal tests from 400-800 °C to determine their maximum compatibility temperature. Bulk samples of AlN+5 wt%Y₂O₃ showed significant mass loss at 600 °C and higher temperatures. The amount of attack was reduced when AlN+0.04 wt%Y was tested. Characterization by Auger spectroscopy of a AlN+0.04 wt%Y specimen exposed at 600 °C indicated the possibility of a lithium aluminate compound formation. Bulk, polycrystalline specimens of CaO (99.9% purity) showed mass losses above 500 °C indicating a possible dissolution problem that had not been observed in previous short-term screening tests and is not predicted based on thermodynamic calculations. Doping of the lithium with oxygen (in the case of CaO) did not appear effective in reducing the mass loss at 600 °C.

Original language	English
Pages (from-to)	52-56
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	289
Issue number	1-2
DOIs	https://doi.org/10.1016/S0022-3115(00)00683-8
State	Published - Feb 2001

Funding

The research was sponsored by the Fusion Energy Materials Program, US Department of Energy (DOE), under contract DE-AC05-00OR22725 with UT-Battelle, LLC. D. Braski at ORNL assisted with the AES work and J. King supervised the welding of the test capsules. J. H. DeVan, A. F. Rowcliffe, P. F. Tortorelli and S. J. Zinkle provided comments on the manuscript.

Funders	Funder number
Fusion Energy Materials Program
US Department of Energy
U.S. Department of Energy	DE-AC05-00OR22725

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/S0022-3115(00)00683-8

Cite this

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title = "Long-term stability of ceramics in liquid lithium",

abstract = "Two candidate materials for insulating coatings in a lithium-cooled fusion reactor have been exposed to lithium in 1000 h isothermal tests from 400-800 °C to determine their maximum compatibility temperature. Bulk samples of AlN+5 wt%Y2O3 showed significant mass loss at 600 °C and higher temperatures. The amount of attack was reduced when AlN+0.04 wt%Y was tested. Characterization by Auger spectroscopy of a AlN+0.04 wt%Y specimen exposed at 600 °C indicated the possibility of a lithium aluminate compound formation. Bulk, polycrystalline specimens of CaO (99.9% purity) showed mass losses above 500 °C indicating a possible dissolution problem that had not been observed in previous short-term screening tests and is not predicted based on thermodynamic calculations. Doping of the lithium with oxygen (in the case of CaO) did not appear effective in reducing the mass loss at 600 °C.",

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AU - Chitwood, L. D.

AU - Di Stefano, J. R.

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AB - Two candidate materials for insulating coatings in a lithium-cooled fusion reactor have been exposed to lithium in 1000 h isothermal tests from 400-800 °C to determine their maximum compatibility temperature. Bulk samples of AlN+5 wt%Y2O3 showed significant mass loss at 600 °C and higher temperatures. The amount of attack was reduced when AlN+0.04 wt%Y was tested. Characterization by Auger spectroscopy of a AlN+0.04 wt%Y specimen exposed at 600 °C indicated the possibility of a lithium aluminate compound formation. Bulk, polycrystalline specimens of CaO (99.9% purity) showed mass losses above 500 °C indicating a possible dissolution problem that had not been observed in previous short-term screening tests and is not predicted based on thermodynamic calculations. Doping of the lithium with oxygen (in the case of CaO) did not appear effective in reducing the mass loss at 600 °C.

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Long-term stability of ceramics in liquid lithium

Abstract

Funding

UN SDGs

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